Is A77.4 a billable ICD-10-CM code?

No. A77.4 is a non-billable header code. Code to a higher level of specificity using one of its child codes.

Where does A77.4 sit in the tabular list?

Certain infectious and parasitic diseases (A00-B99), in the block Rickettsioses (A75-A79).

What cannot be coded together with A77.4?

A77.4 carries an Excludes1 note, which means the conditions it lists can never be coded together with it on the same encounter.

A77.4

A77.4 — Ehrlichiosis

Non-billable headerICD-10-CM

A77.4 is a non-billable header ICD-10-CM code for ehrlichiosis. It cannot be billed on its own: choose one of the more specific child codes below.

Excludes1 — never code together

These conditions cannot occur together. Billing both on the same encounter is a denial.

anaplasmosis [A. phagocytophilum] (A79.82)
rickettsiosis due to Ehrlichia sennetsu (A79.81)

Risk adjustment

A77.4 does not map to an HCC and does not risk-adjust under CMS-HCC V28. That is normal — most ICD-10 codes do not. It still needs to be coded correctly; it just will not move a RAF score.

Code to one of these instead A77.4

3 child codes. Green means billable.

Related codes at this level

Codes that share A77. If A77.4 is not quite right, the correct code is usually one of these.

Questions about A77.4

Is A77.4 a billable ICD-10-CM code?: No. A77.4 is a non-billable header code. Code to a higher level of specificity using one of its child codes.
Where does A77.4 sit in the tabular list?: Certain infectious and parasitic diseases (A00-B99), in the block Rickettsioses (A75-A79).
What cannot be coded together with A77.4?: A77.4 carries an Excludes1 note, which means the conditions it lists can never be coded together with it on the same encounter.